History Sildenafil compound UK, was synthesized by a group of pharmaceutical chemists led by Simon Campbell [55] working at Pfizer’s Sandwich, Kent , research facility in England. The substance is the same under both trade names. Rarely reported side effects include: an erection that will not go away priapism. If you want around-the-clock ED treatment, daily dosages of Cialis or Tadalafil might be right for you. This, in my view, is the key issue in this appeal. Retrieved 6 October The information provided is for educational purposes only and is not intended to replace discussions with a healthcare provider.Viagra (sildenafil) is a brand-name oral tablet prescribed for erectile dysfunction. The cost of the drug with and without insurance can depend on several . Generic Viagra Sildenafil Switch to brand medication info_outlined Used for Erectile Dysfunction MORE expand_more Check your prescription Prescription mg sildenafil . Q&A Drug Images What is Viagra? If you have erectile dysfunction (ED), your doctor may recommend that you take Viagra. It’s a prescription drug that’s used in .